As it stands, Russian Federation sits at the top of the group, followed by Portugal and Mexico while New Zealand, who were thumped by the hosts 2-0 on Saturday, are bottom.
"It wasn't the result that we wanted", said Ronaldo.
The European champs drew 2-2 with Mexico in their opening Confederations Cup game on Sunday.
Until then, Mexico had arguably been the better team; an aggressive press, intensity and very high defensive line was bold and a statement of intent from coach Juan Carlos Osorio.
Having threatened with a header earlier, Hernandez stole in to head home an equaliser three minutes from the interval.
Russian Federation will be missing key men as they host the 2017 Confederations Cup, such as Alan Dzagoev - who also missed the Euros last summer - and Roman Zobnin to injury, while manager Stanislav Cherchesov has opted against selecting 26-year-old striker Aleksandr Kokorin, even after the Zenit man netted his nation's only goal in a 2-1 friendly defeat to the Czech Republic this month.
This baffled Brian Kerr, who was not happy with the amount of time the assistant ref had allowed to be played before informing the referee of the offside, and Didi Hamann too was not impressed as he described the incident as a farce. Minutes after coming on, he almost scored a great headed goal but Ochoa came up with a terrific save.
"We also managed to keep Cristiano Ronaldo in check". Vela simply lifted the ball into the box and Hernandez threw himself at the ball, and this time his header flew past Rui Patricio and into the bottom corner.
Ronaldo played well and made the first goal but did not score.
Portugal vs Mexico Live Streaming: ITV Hub, Fox Sports, Sony LIV and fubo.tv.
Ronaldo added in his post-match interview: 'We are calm and we have to think about the next game. "The draw is a fair result without doubt", said Portugal coach Fernando Santos, whose side wore black armbands in honour of the victims of a deadly forest fire back home. They were second-best on the ball here, although they enjoyed the bulk of the chances and, on the balance of the second half, possibly deserved to win the game.